Signature stamp for multigraphing machines



April 6 1926. 1,580,009

H. T. BUCK SIGNATURE STAMP FOR MULTIGRAPHING MACHINES Filed. Dec. 26.1924' W1TNE.SSES INVENTOR HOWHRDZBVC'K ATTORNEYS Patented Apr. 6, 1926.

UNITED- STATES nownm manor. nucx,

. mm. 00., or NEW ran 0]? CEDAR KNOLLS, NEW JERSEY, ASSIGNOR TO T. S.BUCK N. Y., A. CORPORATION OF NEW- YORK.

sreim'runn STAMP- ron mun'rremrnme macnmns.

Application filed December 26, 1924. Serial No. 758,219.

To all whom it may concern:

Be it known that I, HOWARD T. Book, a citizen of the United States ofAmerica, and a resident of Cedar Knolls, in the county of Morris andState of New Jersey, have invented anew and" Improved Signature Stampfor Multigraphing Machines, of which the following is a full, clear, andexact description.

This invention relates to signature stamps I for applying'signat'urestd' form letters and has particular reference to a signature stamp foruse in connection with multi graphing machines.

Originally thesignature stamps for use in connection with multigraphmachines were produced by the electrotyping process so that the raisedsignature formed an integral part of a rigidmetal backing plate. Itdeveloped that'- the rigid metal type and backing plate tended to createa depression in the sheets which failed to closely simulate a writtensignature. The signaturestamps were subsequently made from rubber orother analogous materials which were elastic or yieldable but which weresecured to a rigid backing member or base. These backing members orbas'esdue to their rigidity, while'of a fairly satisfactory nature havebeen found to present certain difiiculties on account of the slightvariance of the-diameter of the drums or rollers of the multigraphingmachines to which they are applied.

It is therefore an outstanding object of the present invention. tovfurther improve the signature stamp whereby to eliminate this difficultyby providing the rubber sig elastic and connature sheet with a flexible,formable backing member or base thereby compensating for the.variance'in the diameter of thejdrums or rollers.

The invention furthermore comprel'iendsv base of ajflex ble, elastie andconformable material WlllCh when a backing member or flexed will notremain distorted. i

The invention ing'machines which is comparatively simple in itsconstruction, inexpensive-tomanufacture and which 1s highly efliclent nits purpose. a With the above recited. and other ob ects in view, theinvention resides 1n the novel construction forth in the foliowingspeclfurthermore contemplatesa signature'stamp structure for mult graphsaid base being fication, particularly pointed out n the appended claimand illustrated in the accompanying drawings the right is reserved toembodiments other than those actually illustrated herein, to the fullextent indicated by the general meaning of the terms in which the claimis ex pressed.

- In the drawings- I Figure 1 is a face view of a signature stampconstructed in accordance with the invention. I

Fig. 2 is a transverse sectional view therethrough taken approximatelyon the. line 2-2 oniig. 1.

Referring to the drawings by characters of reference the signature stampincludes a strip 10 of yieldable' material such as rubber or the likeupon the face of which the raised or embossed signature 11 is produced.The

said strip 'is applied to' a backing 12 by 'it being understood that anadhesive layer or coating 13 such as shelvature of the drums or rollersand is therefore capable of compensating for variations in the termelastic it is used in its broadest interpretation namely to imply thatthe same is capable of returning to a normal shape when flexedtherefrom. The material from which the backing member orfbase 12 isformed is preferably celluloid or' a' material having the characteristics ofcelluloid so that the same is not readily distorted bybending to a distorted position, and which further includes thepropertyof lightness.

I I claim:

As a new article of manufacture at signature stamp for multigraphingmachine's comrising a strip of yieldable material havmg the signatureraised thereon, a backin member or base constructed: of celluloid an;adhesively attached to. said of arcuate,

ormatibn with the yieldable surface thereof.

rip attached the convex ma ron BUCK.

The backing 12 is condiameter of the same. In using the ieldable strip,

